tonight inside the obama and romney debate camps. how the candidates are preparing for the showdown. >>> making the case. the supreme court begins. >>> and carmageddo 2. what happened this weekend when one of the busiest highways in the countries was shut down. how did california cope with its freeway car free? >>> good evening from the joint command headquarters of the international security assistance force in kabul. we have been traveling through this country all week trying to take measure of this war, another insider attack has left a u.s. soldier and an american civilian dead. that brings the death toll to 2,118. so far this year, 267 have been killed. 31 of those killed at the hands of afghan police and military members. insider attacks. tonight against the backdrop of next month's presidential election, we're beginning a special look at a region at the brink and the foreign policy challenges that america is facing here in syria and afghanistan. richard engel, you have more on that attack today? >> reporter: cooperation betwee